n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 17 |
5 | 73 |
6 | 388 |
7 | 2461 |
8 | 18155 |
9 | 152531 |
10 | 1436714 |
11 | 14986879 |
12 | 171453343 |
13 | 2134070335 |
14 | 28708008128 |
15 | 415017867707 |
16 | 6416208498137 |
17 | 105630583492969 |
18 | 1844908072865290 |
19 | 34071573484225549 |
20 | 663368639907213281 |
21 | 13580208904207073801 |
[1,1,2,5,17,73,388,2461,18155,152531,1436714, 14986879,171453343,2134070335,28708008128, 415017867707,6416208498137,105630583492969, 1844908072865290,34071573484225549, 663368639907213281,13580208904207073801] |